Configuration (Set-Up) - Process Technology DQ15D Instruction Manual

factory range setting is 0-500º F vs. 4-20 mA. Custom ranges can be
accommodated if specified at time of order. Field calibration can use a
similar arrangement or a 4-20 mA calibrator for verification.
Typical 4-20 mA CURRENT LOOP
maximum impedance = 450 ohms
Term 7 +
Term 6 -
DQ15D CONTROL
with
4-20 mA OUTPUT METER, CALIBRATOR,
Calibration procedure for 4-20 mA output:
Since calibration is an involved operation, it is suggested that it be per-
formed only after determining that the measured values differ from fac-
tory settings, or if the output range is to be altered.
WARNING!
Calibration procedures require the removal of the rear cover of the
control. It also requires that power is ON, exposing the technician to
potentially lethal voltages. Exercise EXTREME CARE and wear
tested electrician's gloves whenever power is on.
Equipment needed:
An NIST traceable sensor simulator (calibrator), a precision 20 mA (or
higher) calibrator/tester, or a precision DMM for verification.
Step 1: Turn OFF all power.
Step 2: Remove rear cover.
Step 3: Remove sensor leads.
Step 4: Install appropriate sensor calibrator, i.e. resistors or
thermocouple simulator.
Step 5: Remove ONE lead of the 4-20 mA output wire and install
the DMM or tester in series with the external loop and
this terminal. OBSERVE POLARITY.
Step 6: Restore power to control.
Step 7: Verify basic instrument sensor input accuracy by
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include wire resistance in impedance calculations
- + - +
CURRENT LOOP CURRENT LOOP
DEVICE DEVICE
PLC, REMOTE DISPLAY,
simulating various sensor inputs and observing the
display values. If out of tolerance, perform appropriate
sensor calibration before proceeding.
Step 8: Press decrease " " and increase " " keys simultaneously
and hold for approximately 6 seconds. The display will
indicate "AC.0". While the "0" is flashing, use increase
key to enter "33". The display will change to indicate "L"
followed by the current lower process limit, i.e. "0°",
"-20°", "0 volts", etc.
Step 9: Use the increase " " key or decrease " " key to alter
the lower display value. Press the "SET" key to store the
new value. The display will then read hexadecimal "2AAA"
or 4.0 mA, verify that this is the value displayed on your
4-20 mA calibrator/tester or DMM.
Step 10: Adjust the lower current value by pressing the increase
" " or decrease " " key. Press the "SET" key to retain
the value. The display will read "U" followed by the
current upper display value limit, i.e. "500º", 10 volts, etc.
Step 11: Use the increase " " key or decrease " " key to alter
the upper display value. Press the "SET" key to retain the
value. The display will then read hexadecimal "D555" or
20.0 mA. Verify the value by observing the value on your
4-20 mA calibrator/tester or DMM.
Step 12: Adjust the upper current output value by pressing the
increase " " or decrease " " key. Press the "SET" key
to retain the value. The display will then return to the
current sensor input value and the 4-20 mA output will
reflect your new or confirmed settings.
Step 13: Turn OFF all power.
Step 14: Disconnect calibration equipment.
Step 15: Reconnect 4-20 mA lead and sensor leads.
Step 16: Reinstall rear cover.

CONFIGURATION (Set-up)

To configure the DQ15D temperature control, press the increase " "
and decrease " " keys simultaneously and hold for approximately 6 sec-
onds. The display will indicate "AC.0". while the "0" is flashing, use the
increase key to change this to "11". Press the "SET" key. The control will
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