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Description
Models 2200P pH and 2200R ORP are rugged industrial grade
instruments. They provide reliable accurate measurements, flexible on/off
relay control, analog outputs and other features that only a microprocessor
can provide. They incorporate the latest in high density CMOS technology
coupled with nonvolatile memory.
The instrument accepts two types of sensor inputs:
a Lisle-Metrix 5-wire differential electrode technique sensor or a conventional
combination electrode with integral or separate temperature sensor.
Display
Capability
The 2200P features a large LED display, which
is easily read under any ambient light conditions. The display continually
reads the pH of the process solution and may also be used to read temperature
of the solution at the touch of a button.
The display is also used when configuring the instrument and to recall
the selected values for control setpoints, alarm points and analog output.
System diagnostic error messages are displayed when the instrument detects
abnormal conditions.
Output
Flexibility
Instrument outputs proportional to the measured value include non-isolated
0-5 Vdc. 0-1 mA and isolated 4-20 mA. An automatic hold function maintains
the latest output during calibration or while configuring the instrument.
The 4-20 mA analog output can represent the measuring scale or any desired
segment of it by simply entering the output high and output low values
on the instrument panel. For instance, if the range of interest was 6
pH to 8 pH the instrument would be programmed to output 4 mA at 6 and
20 mA at 8 pH.
The instrument has two SPDT 5 amp control relays which may be individually
programmed to operate on rising or falling pH. Thus the control relays
may be used for bi-directional control. Of course, both relays have individual
deadband (hysterisis) adjustment.
A third relay with fixed deadband provides high and low alarm. This relay
can also be programmed to energize in response to a system malfunction.
This condition is indicated by a LED on the panel.
All relays can be selected for "fail-safe" operation, which reverses the
"normal" operation. In this mode relays would fail safe (transfer) in
the event of a power failure.
An Auto/Off/On switch allows the operator to override the action of Relay
A. This feature is useful in setup and in checking the controlled device.
When a questionable value is entered or when there is a sensor or instrument
malfunction the alarm relay will be activated and a numeric message can
be displayed which is indicative of the type of error.
Cycling
On-Off Control Option
Relay A can be provided with an on-off cycling action control and
minimize to obtain closer process overshoot. On time and off time are
independently adjustable through the menu.
User-Friendly
Operation
The 2200P is remarkably simple to configure and operate. Seldom used adjustments
such as the temperature unit (0F or 0C) and direction of control are located
on DIP switches on the back of the swing-out front panel. More frequently
used adjustments such as setpoints and calibration are adjusted by push
button on the front of the panel.
To configure the 2200P it is placed in menu mode by simply pressing the
CALL button. With each press of CALL the instrument steps through the
menu on the front panel. When the desired item has been called the displayed
value is adjusted to the desired value by the use of the up and down arrows.
Then press ENTER and the new value is stored.
For example to set a control relay for 8 pH the following steps are taken:
1. Press CALL until RELAY A is indicated.
2. Use the up and down arrows until the
display reads 8.00.
3. Press ENTER.
The new setpoint for relay A is now 8.00 pH.
Similarly the other setpoints, the deadbands and the analog high and low
output are programmed by this simple three-step method.
At any time, of course, the operator may display a setpoint by simply
calling it up with the CALL button and then returning to operation with
the RUN button.
Another useful feature is to call TEST, which with the arrow buttons,
allows the operator to sweep through the range of the instrument and observe
where the setpoints and alarm points occur. Similarly the simulated value
of the analog outputs can be verified.
Calibration
Calibration could not be easier. Here are the steps:
1. Press CALL to indicate CALIBRATION.
2. Place the probe in a buffer solution.
3. Change the display with the arrow buttons until it reads the value
of the buffer.
4. When the display stops flashing a stable reading is indicated. Press
ENTER.
If a two-point calibration is desired the procedure is
repeated in a second buffer and the instrument is now calibrated.
To further simplify the procedure the instrument will recognize a number
of standard buffers. To use this procedure, CALL is pressed to indicate
AUTO CAL. The instrument will recognize the buffer and will immediately
indicate its value. The display will flash until the reading is stable.
Then press ENTER. Repeat with a second buffer if desired and calibration
is complete. Only four key strokes to perform a two point calibration!
Temperature
Provided the instrument is used with a Lisle-Metrix pH probe, which has
an integral temperature sensor, the instrument may at any time be used
to give a temperature reading of the process. The temperature unit can
be selected for Celsius or Fahrenheit. Furthermore the 0-5 Vdc analog
output may be selected to follow either pH or temperature.
Security
If desired a Password function may be enabled. With this configuration
all stored values can only be changed by first entering the Password number
with the arrow buttons. A watchdog timer continuously monitors the microprocessor.
The enclosure may also be fitted with a lock if desired.
Status
Indication
Three rectangular LED's above the display indicate the status of the three
relays. A fourth bicolor status LED shows green to indicate normal run
on line mode or red to indicate system error or malfunction.
At any time the status of the system may be requested by pressing CALL
to indicate STATUS. The display will show a normal operation code or malfunction
code.
Utility
Menu
A utility menu is provided which can only be entered by pressing two particular
buttons simultaneously for five seconds and then entering a password.
This procedure allows authorized personnel to perform such functions as
fine-tuning of the analog outputs and temperature sensing if desired.
Installation
The 2200P is housed in a NEMA 4X fiberglass reinforced polyester enclosure,
which suits it for hostile environments. The standard enclosure is fitted
for surface mounting or it can be panel or pipe mounted with optional
hardware kits.
The door is easily opened by releasing two toggles. Access to the terminal
strips is provided by turning one screw and swinging aside the control
panel. Four ½" conduit holes, one of them plugged, are provided in the
bottom of the enclosure to allow for convenient separation of line power,
input and outputs.
Communications
Digital communications interface R5232 or R5423 are available options.
Specifications
DISPLAY:
3½ digit LED. ½" high digits
MEASURING
RANGE:
pH: 0.00 to 14.00 pH
ORP: 0 to 600 mV, or 0 to 1000 mV. or -600 to 600 mV.
or -1000 to 1000 mV
Temperature: 0ºC to 100ºC (32ºF to 212ºF)
POWER REQUIREMENTS:
98-132 Vac, 50/60 Hz (less than 11 VA) Optional: 196-264 Vac, 50/60 Hz
AMBIENT CONDITIONS:
-30 to 50ºC (-22 to 122ºF) 0 to 90% R.H. non-condensing
CONTROL RELAYS:
Two relays can be independently set for operation in response to rising
or falling value and for fail-safe operation. Deadband (hysteresis) independently
adjustable Rating: 5A 115/230 Vac, 5A 30 Vdc. SPDT Auto/Off/On switch
permits Relay A override Optional: Both relays can be provided with cycle
action. On time and off time are each adjustable from 1 second to 600
seconds.
ALARM RELAY:
High-Low with fixed deadband of 2% of full scale. Normal or fail-safe
operation
Rating: 5A 115/230 Vac, SA 30 Vdc. SPDT
RELAY
INDICATORS: Three individual rectangular LED's indicate status
of the two control relays and the alarm relay.
ANALOG
OUTPUTS: Non-isolated 0-1 mA, 100 ohms maximum load Non-isolated
0-5 Vdc. 1000 ohms minimum load Isolated 4-20 mA. 800 ohms maximum load
The isolated output is isolated from the input, ground, line power and
all other outputs.
Range Expand: The 4-20 mA analog output can be made to represent
1.5 pH or larger segment of the measuring scale (200 mV for ORP)
Output Hold: The analog outputs are automatically placed on hold
during calibration or other setup operations.
Temperature Output: The 0-1 mA and the 0-5 Vdc outputs jointly
can be programmed to follow the process temperature or pH. (The ORP outputs
can follow temperature if the probe is ordered with a temperature sensor.)
SENSOR-TO-ANALYZER
DISTANCE: 3000 feet maximum for Lisle-Metrix 5-wire differential
electrode technique sensor. 10 feet maximum for direct connection of conventional
combination electrode (a Lisle-Metrix Series 100 preamplifier is required
for distances greater than 10 feet)
TEMPERATURE
COMPENSATION: Automatic 0 to 1000C (32 to 2120F)
CALIBRATION:
Two point or automatic with buffer recognition.
SYSTEM ERROR:
A rectangular LED indicates system error. The alarm relay can be programmed
to transfer upon system error.
DIAGNOSTICS:
Invalid entries are identified by respective flashing LED. When system
error is indicated call STATUS to obtain condition code.
TEST: Display
value and analog outputs can be set manually to any value for testing
and diagnostic purposes. This feature allows the operation of the control
relays, alarm relay and outputs to be tested independently of process
value.
SAFETY
AND SECURITY: Nonvolatile memory (EEPROM) Passcode protected if
selected Watch-dog timer monitors microprocessor Instrument automatically
returns to on line operation if accidentally left in menu mode. This feature
may be field disabled if desired)
SENSITIVITY:
0.1% of span
STABILITY:
0.1% of span per 24 hrs., non-cumulative
NON-LINEARITY:
0.1% of span
REPEATABILITY:
0.1% of span or better
TEMPERATURE
DRIFT:
Zero: 0.01% of span per ºC
Span: 0.01% of span per ºC
RESPONSE
TIME: 0.5 second to 90% of value upon step change
ENCLOSURE:
NEMA 4X molded fiberglass reinforced polyester enclosure with four ½"
conduit holes and mounting feet for surface mount. A NEMA 4 plug is provided
for one hole.
MOUNTING
CONFIGURATIONS: Standard is surface mount
Optional panel mount hardware. Part No. 35-68
Optional pipe mount hardware. Part No. 35-69
NET WEIGHT:
3½ lb (1.6 kg)
Dimensions
Click
here for image. (2200P_Dims.jpg, 30k)
Ordering Information
Model Number
2200P: pH Analyzer, microprocessor based, in NEMA 4X enclosure,
digital LED display, 2 control relays with adjustable deadband, 1 high/low
alarm relay with fixed deadband, 0-1 mA and 0-5 Vdc non-isolated outputs,
4-20 mA isolated output with range expand.
Power Supply
1 110 Volt, 50/60 Hz
2 220 Volt, 50/60 Hz
Cycling On/Off Control
A Standard instrument without relay cycling feature
B Cycling on/off control
Communications
1 None
2 RS 232
3 RS 422
Standard enclosure is surface mount. Panel and
pipe mount kits must be ordered as separate line items.
Panel Mount Kit: Part No. 35-68
Pipe Mount Kit: Part No. 35-69 (suitable for both horizontal and
vertical)
Example: 2200P1A1
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