Pace PM200 Service Manual
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p
PPM 200 Process Monitor
Calibration Instructions
PACE Part Number 8007-0464-P1
Manual Part Number 5050-0563
Prepare:
The following tools and equipment will be necessary to complete this procedure.
Temperature Calibrator, Signal generator and DC regulated power supply, standard resistors (0.5), and a
room
). The accurate measurement of room temperature will be
room
” should be shown on the LCD screen. If the data is not
room
”.
room
, 400+T
room
, 500+T
”. If any of the temperatures do not match the
room
small screwdriver for pot adjustment.
1) Power on PM200 and verify the display is functioning.
2) If unit has been in use, allow the PPM to cool down for 30 minutes before attempting calibration.
3) Make note of room temperature (T
necessary for completing this calibration.
Adjust the temperature:
1. Power on unit, and switch “C-F” to “C” position. Set dial to “temperature” position. Input a voltage at the
two terminals of the temperature input:
2. Adjust potentiometer “VR6” so that the voltage value of the seventh pin on component U9 is 0mv.
3. When the input voltage equals 0mv, “001+T
“001+T
”, please adjust the potentiometer “VR8” until the display shows “001+T
room
4. When the input voltage equals 24.905mv, the LCD screen should display “600+T
potentiometer “VR4” until the display shows “600+ T
5. Input the voltage(s) 4.096mv, 8.138mv, 12.209mv, 16.398mv,and 20.664mv, should display
“100+T
room
, 200+T
room
, 300+T
input voltages, please re-adjust the potentiometers”VR4” and “VR8” until the LCD display shows the
correct data.
”
room
”. Adjust the
room
VR8
VR4
U9 the seventh
in
6. Switch PPM-200 “C-F” to “F” position. Repeat the steps from “ 1” to “3”. Room temperature (F)
should be displayed on the LCD screen.
If you are calibrating multiple PM200’s, allow units to rest for 30 minutes to
insure device has returned to ambient room tem
NOTE
erature.
32(F)”
－
Adjust the voltage:
A
1. Set dial to “mv” position. Adjust switch “S1” on the PCB board to the “TEST” position (move switch to the
down position).
2. Switch “TEST” on the faceplate to the “ground” position and hold, adjust the potentiometer “VR2” until
LCD display is showing lower possible mv but not “0mv”.
3. Adjust the potentiometer “VR9” until the showing lower possible mv but not “0mv”..
4. Adjust the potentiometer “VR2” until the display shows “0”.
5. Let go hold of the switch “TEST” on the faceplate.
6. Input voltage (d.c.)
7. Input voltage (d.c.)＝90mv, adjust the potentiometer “VR5” until the display shows “90.0mv＋Vx”.(Vx is
the voltage value of the testing line from instrument for power to test terminals.)
8. Dial the switch “S1” on the PCB board to the “AC” position (dial up the switch). Input voltage (d.c.)
70 mV、50 mV、20 mV、10 mV, the tolerance is (Input voltage
mV
、
tolerance range, please re-adjust “VR2” and “VR5”.
0mv, record value on the PM200 display as “Vx”.
＝
VR6
Vx)±3 ±0.2mv . If it is not in the
＋ ﹪
＝
90
VR2
S1
VR5
VR9
9. Dial S1 up, and input a signal ( f
80mV, 90mV) ,the display will show the corresponding data. If it is not correct, please repeat step 1, 2,
and 3 to check the calibration process.
Adjust the resistance:
1. Dial the switch to “OHM” position. Hold the “TEST” switch on the faceplate to the “ground” position and
adjust the potentiometer “VR7” until the display shows “0”.
2. Release “TEST” switch on the faceplate. Insert the jack of the testing line in the ground jack and the
other end to the testing post of the PM200’s OHM.mV plate, record value on the display as “Rx”.
3. Input the standard resistance “90Ω”; adjust the potentiometer “VR1 ” until the display shows “90Ω
(Rx is the resistance value of testing line) Input the standard resistance “10, 20, 30, 40, 50, 60, 70, 80,
90”Ω, re-adjust the potentiometers “VR7 and VR1”, until the value is equal with standard . The tolerance
is (Input resistance
Rx)±1﹪±0.2Ω.
＋
55hz, voltage value 10mV, 20mV, 30mV, 40mV, 50mV, 60mV, 70mV,
＝＝
Rx”.
＋
VR7 VR1
PACE Incorporated
9030 Junction Drive
nnapolis Junction,
MD 20701
Tel: (301) 490-9860
Fax: (301) 498-3252
PACE Europe Limited
13 Tanners Drive
Blakelands
Milton Keynes
Tel: (44) 1908-277666
Fax: (44) 1908-277777
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