JENCO 3321 User manual

Operation Manual
MODEL 3321
Microcomputer Based Conductivity/Resistivity Controller
JENCO ELECTRONICS, LTD.
MANUFACTURER OF PRECISION INSTRUMENTS

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CONTENTS
GENERAL INTRODUCTION………………………………………..………....................2
INITIAL INSPECTION……...………………..................................................................2
USING THE JENCO MODEL 3321……......................................................................3
A. Mounting procedure.....................................................................................3
B. Front panel....................................................................................................5
C. LCD screen....................................................................................................7
D. Rear connectors...........................................................................................9
E. Measure mode.............................................................................................10
F. Setting mode................................................................................................11
G. Conductivity/Resistivity calibration mode..............................................18
H. Controlling the relays.................................................................................19
ERROR DISPLAY AND TROUBLESHOOTING……………..……….........................21
SPECIFICATIONS……………..………………………………………........................23
WARRANTY……………..………...............................................................................25

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GENERAL INTRODUCTION
Thank you for selecting the JENCO Model 3321. The 3321 Conductivity/Resistivity
Controller is a rugged microprocessor based instrument assembled in a watertight 1/8
DIN case, designed for use in laboratories and process control applications.
The system displays Conductivity / Resistivity or Temperature status in one large LCD
screen.
The model 3321 microprocessor performs a self-diagnostic routine every time you turn
on the unit, it will provide you with basic information on the stability of the instrument.
The model 3321 is equipped with 2 control relays. All control relays are programmable
and hysteresis driven.
INITIAL INSPECTION
Carefully unpack the unit and accessories. Inspect for damages made in shipment. If
any damage is found, notify your Jenco representative immediately. All packing
materials should be saved until satisfactory operation is confirmed.

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USING THE JENCO MODEL 3321 ERVIEW
A. Mounting Procedure
PANEL CUTOUT DIMENSIONS
45.0
1.772"
92.0 3.622"
0.813 0.032
0.61
0.024
0.00
0.000
0.000 0.000
±±
±
±
DRAWING 1
1. Make a cutout on any panel, with a
thickness of 1/16 inch (1.5mm) to
3/8 inch (9.5mm). Refer to
DRAWING 1.
DRAWING 2
2. Remove the mounting assembly
from the controller and insert the
controller into the cutout. Refer to
DRAWING 2.
Mounting Brackets

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Panel Mounting brackets
DRAWING 3
3. Replace the mounting bracket
assembly onto the controller and
secure the controller to the
mounting panel. Refer to
DRAWING 3.
【 Note 】 :
If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.

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B. Front Panel
The front panel consists of a 4-digit LCD display and 4 keys.
mS
ATC
COND CONTROLLER 3321
1. [ MODE ] key:
1a. In the Measure mode, this key will switch the display in sequence from
Conductivity, Temperature and back to Conductivity again or from Resistivity,
Temperature and back to Resistivity again.
1b. In the Calibration/Setting mode, pressing this key for five seconds will move
you back to the previous parameter in the case when recalibration / resetting is
required.

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2. [ UP ] key:
2a. In the Calibration mode, pressing this key will increase the numeral increment.
In the Setting mode, pressing this key will show the next possible option and
increase the numeral increment.
2b. In the Measure mode, pressing this key and [ENTER] key at the same time,
the unit will enter the Calibration mode.
3. [ DOWN ] key:
3a. In the Calibration mode, pressing this key will decrease the numeral
increment. In the Setting mode, pressing this key will show the next possible
option and decrease the numeral increment.
3b. In the Measure mode, pressing this key and [ENTER] key at the same time,
the unit will enter the Setting mode.
4. [ ENTER ] key:
In any mode where the user can change the settings, pressing this key will save
the new settings. If no change has been made then pressing this key will just lead

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the user to the next setting.
C. LCD screen
HI1 LOW2 HI2 LOW1
uS
CAL
MAN
M
mS
ATC
1 2 3 4 5 6
1098
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1. Major LCD display.
2. CAL – This icon will be displayed if the meter is in the Calibration/Setting mode.

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3. HI1 & LOW1 – These icons, when displayed, indicate relay action and relay
number.
4. HI2 & LOW2 –These icons, when displayed, indicate relay action and relay
number.
5. MΩ–Unit indicator.
6. ℃–Temperature and unit display.
7. uS – Unit indicator.
8. ATC –This icon will be displayed when a temperature probe is connected.
9. MAN –This icon will be displayed if no temperature probe is not connected.
10. mS – Unit indicator.

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D. Rear connectors
CELL 10K TH
100~230VAC
LNE
Rel 1 Rel 2
Shield
*Specify “L’ = “Live Lead” 100 to 230 VAC Volts and “N” = “Neutral Lead”
1. Connect the AC line to the rear of the instrument. The model 3321 can be used
with 100~240V AC at 50/60 HZ. Make sure the EARTH connector is connected to
the earth lead of the AC power line.
2. Connect the proper load to the output relays. Make sure that the load does not
exceed the relay rating, 5 Amp at 115VAC and 2.5 Amp at 230 VAC.