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EZ-Check
™
Switch
The EZ-Check™ switch has three positions -- high, dial, and low. Its position is shown at the left edge of the display with “HI” and
“LO” indicators. Neither indicator indicates the middle position. Use of the EZ-Check™ switch depends on mode.
Source Modes:
Slide the EZ-Check™ switch to the HI and LO positions to recall the preset settings (Hi=20.00mA & Lo=4.00mA).
Hint: For faster calibrations, the position of the switch can be felt. This feature allows continuous monitoring of the device
being calibrated without looking back at the CL531 display. This is also useful in poor lighting or under difficult operating
conditions.
Read Modes:
In read mode, the CL531 calibrator records the maximum and minimum readings observed in each mode. Slide the EZ-
Check™ switch to the Dial position to read the loop. Then Slide the EZ-Check™ switch to the HI and LO positions to display
the max and min readings. Press
EZ-Dial
™
knob
to clear the readings. The display will flash “CLEARED” to confirm.
Source Mode
Source mode uses internal power to supply current from 0.00-24.00 mA into as much as 1200Ω until the end of battery life. The
calibrator Graph will flash if connected improperly. The three-position EZ-Check switch provides instant preset 4mA at zero, 12mA at
mid range and 20mA at full scale outputs. The output is adjusted in 0.01 or 0.10 mA increments (0.1 or 1.0) % display units with
the EZ-Dial knob.
2-Wire Transmitter Simulation Mode
The CL531 can simulate a 2-wire transmitter in the 4-20 mA or % process loop. In source mode press the EZ-Dial™ Knob twice
to get into the feature options. Then press the EZ-Dial™ Knob to select mA 2 – wire. The EZ-Check switch and EZ-Dial knob allow
rapid and fine control of loop current.
TransmitterInput
(Sensor)
(ProcessSignal)
(SimulatedInput)
Receiver
PowerSupply
0to60VDC
Typical
2-Wire
Transmitter
+IN-REF+OUT-
TransmitterInput
(Se ns o r)
(Pro ce ss Signa l)
(SimulatedInput)
Receiver
PowerSupply
0to60VDC
Typi ca l
2-Wire
Tran s mitter
+IN- REF+OUT-
CL531 Pocket-Mate
CL531 Pocket-Mate
CL531
mA LOOP CALIBRATOR
CL531
mA LOOP CALIBRATOR