Pace PM200 Service Manual

p

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: [phone]
Fax: [phone]

PACE Europe Limited

13 Tanners Drive
Blakelands
Milton Keynes
Tel: [phone]
Fax: [phone]