PIE 235 Operating Instructions Manual

Page 1

Copyright © 2016 All rights reserved • 235-9002 - Rev C 30 March 2016

PIE Model 235

Process Voltage Calibrator

Operating Instructions

PIE Model 235

Process Voltage Calibrator

Operating Instructions

• Technician friendly operation

Intuitive EZ-DIAL Double Click Menu makes it easier to setup than other calibrators. Turn on
the backlight to easily see the display in dark areas of the plant. Connections diagrams are
indicated on the display for each function along with a labeled connector panel on the top.

• Calibrate with Confidence

Accurate to ±0.02% of Reading + 0.01% Full Scale.
Out of range or over current is indicated by an
audible alarm, flashing display and the
OVERLOAD LED will light.

• Source three ranges of mV & V dc plus percent
of 1 to 5 volts

With the 235 you can check, calibrate and
measure all your voltage, millivolt and pH signal
instruments in your plant. Source -500.00 to

999.00 mV, 1.000 to 5.000 V, 0.0 to 100.0% of 1
to 5 V; 0.000 to 20.000 V.

• Power your loops with over 1,000 Ohm loads

The 20.000 V range has an extended span of up
to 24.000 Volts giving you a portable source for
powering your loops.

• Read DC volts

The 235 can measur

e from -500.00 to +999.00 mV,

0.000 to 5.000 V, 0.0 to 100.0 % of 1 to 5 V; 0 to

20.000 V and 0.00 to 60.00 V DC. Use it to check
loop power supplies, I/V converters, 1 to 5 Volt
signals, and other voltages.

• Save time calibrating recorders and monitors
in 4 to 20 mA loops

Other brands of calibrators require that you break
the loop to calibrate voltage inputs. With the PIE 235
you simply clip the test leads across the voltage inputs
in a live 4 to 20 mA loop without disconnecting any

wires.

• Simulate pH probes into transmitters & analyzers

Use the pH simulator to verify proper operation of pH devices
before you place a probe into a calibrated buffer.

• Quickly set any three outputs plus automatic stepping & ramping

Easily set any value with the adjustable “DIAL” plus store any three output settings for instant recall with
the EZ-CHECK™ switch. 2, 3, 5 & 11 steps automatically increment output in 100%, 50%, 25% or 10% of
span plus continuous ramp. Set step/ramp time to 5, 6, 7, 8, 9, 10, 15, 20, 25, 30 & 60 seconds.

• Designed for you by experienced calibrator manufacturers

PIE Calibrators are designed and built by members of the same team that designed and built the
calibrators manufactured by Fluke* under the Altek* label. The 235 improves upon other brands by
including a rubber boot, backlit display with larger digits, higher accuracy and more ranges for flexibility.

www. .com

[e-mail]1.800.561.8187

Page 2

LO

V

2 1

1.000

+

-

q EZ-CHECK™ SWITCH

SOURCE: Instantly output two preset voltages by

moving the EZ-CHECK™ switch to the “LO” position
or “HI” position.

For fast three point checks select
the “SET” position. The PIE Model 235 will
remember the last “SET” value, even with the
power off.
These values can easily be changed to suit the
calibration requirements. The values stored in the HI
and LO positions are also used for Auto Stepping.

READ: Slide the switch to the SET position. The PIE
Model 235 will display the current voltage from the
process output. Slide the switch to HI and the highest
voltage measured since turn-on or reset will be
displayed; slide the switch to LO and the lowest
voltage measured since turn-on or reset will be
displayed.

w SOURCE/OFF/READ Switch

Select “SOURCE” to output in volts, millivolts, %
of 1 to 5 Volts or pH.
Select “READ” to read volts or millivolts. Select
“OFF” to turn the unit off.

e EZ-DIAL™ KNOB

SOURCE: Turn the knob to adjust the output

level. Turn clockwise to increase the output,
counter clockwise to decrease the output in

0.001 V, 0.01 mV, 0.1% or 0.001 pH steps at a
time. Push down and turn the EZ-DIAL knob for
faster dialing.

Press and hold the knob for two seconds to store
desired EZ-Check™ HI/LO points in SOURCE
mode. Continue to press and hold the knob for
two more seconds to start the automatic
stepping or ramping.

READ: Press and hold to transfer the current
temperature into the EZ-Check™ HI/LO points.
This clears the HI/LO voltage readings which will
update as the input signal changes.

Double click the knob to get into the PIE Model
235 Configuration Mode. Use configuration to
select voltage or pH, Range, Backlight On/Off,
Step Size, Step Time and Auto Off On/Off.

CHANGING BATTERIES

Low battery is indicated by a battery symbol on
the display. Approximately one to four hours of
typical operation remain before the PIE Model
235 will automatically turn off. To change the
batteries; remove the rubber boot, remove the
battery door from the back of the unit by sliding
the door downward. This allows access to the
battery compartment. Replace with four (4) “AA”

1.5V batteries being careful to check the polarity.
Replace the battery door and replace the boot. All
stored configuration options (Range, EZ-CHECK
Memories, etc.,) are reset to factory settings
when the batteries are removed.

Note: Alkaline batteries are supplied and
recommended. Purchase the optional Ni-MH
rechargeable batteries for maximum battery life.

Basic Operation

The PIE Model 235 has two banana jacks
mounted in the top end of the housing.

Connections

2

-

+

1

www. .com

[e-mail]1.800.561.8187

Page 3

Configuration

Configure the Calibrator

Move w POWER SWITCH to “SOURCE” or

“READ”.
Setup

Double click the

e DIAL KNOB at any time the

unit is on and the following displays will appear
for 15 seconds:
Turn the

e DIAL KNOB to move through the two

pages of menus. Press the e DIAL KNOB to
toggle between OFF and ON or to scroll through
the settings.

EXIT - exits this menu immediately and saves
any changes. Menu will automatically exit after
15 seconds of inactivity).

FUNCTION - pressing the knob will toggle
between V and pH.

RANGE - pressing the knob will cycle through
the Voltage ranges of 20V, 5V, 999mV and 60V.

UNITS - pressing the knob will toggle between V
and % only in the 5 V RANGE. The 5 V RANGE
is preset with EZ-CHECK LO and HI at 1.000
(0.0%) and 5.000 V (100.0%).

DOUBLE CLICK

EZ-DIAL KNOB

FOR CONFIGURATION

V#.##

AUTO OFF - If AUTO OFF is ON, the unit will

turn off after 30 minutes of inactivity to save
battery life. If AUTO OFF is OFF the unit will stay
on until the POWER SWITCH is moved to the off
position.

BACKLIGHT - If BACKLIGHT is ON the
backlight will light all the time the unit is powered
up. For maximum battery life turn the backlight
off when using the calibrator in areas with
enough ambient light to read the display.

STEPS/RAMP - pressing the knob will cycle
through 2, 3, 5, 11 and RAMP. The endpoints of
the steps or ramp are based on the values
stored in the HI and LO EZ-CHECK outputs.

2 steps will automatically switch between the
values stored in the HI & LO EZ-CHECK (0 &
100%).

3 steps between the HI, Midpoint and LO
EZ-CHECK (0, 50 & 1

00%).

5 steps between the HI and LO EZ-CHECK
in 25% increments (0, 25, 50, 75 & 100%).

11 steps between the HI and LO EZ-CHECK
in 10% increments (0, 10, 20...80, 90 &100%).

RAMP continuously ramps up and down
between the HI and LO EZ-CHECK outputs.

STEP/RAMP TIME - pressing the knob will cycle
through 5, 6, 7, 8, 9, 10, 15, 20, 25, 30 and 60
seconds.

Note: All settings are remembered even with the
power off. Removing the batteries resets the
values to factory defaults.

MAIN

> EXIT (1/2)

FUNCTION V (pH only in SOURCE)
RANGE

20V 5V, 999mV, (60V READ Only)

UNITS V % (Only in 5V RANGE)

FEATURES

> EXIT (2/2)
AUTO OFF ON OFF
BACKLIGHT ON OFF
STEPS/RAMP 2 3 5 11 RAMP
STEP/RAMP TIME 5 6 7 8 9 10 15 20 25 30 60
(STEP/RAMP settings only in SOURCE)

www. .com

[e-mail]1.800.561.8187

Page 4

SOURCE

Choose this function to provide an output from -500.00 to 999.00 mV, from 0.000 to 20.000 V, from

1.000 to 5.000 V or from 0.0% to 100.0% of 1 to 5 Volts. The source current is a nominal 20 mA to
provide the driving power to your voltage receivers.

Move the power switch

w to SOURCE then Double Click the EZ-DIAL knob to get into the Menu.

Turn the knob to scroll through the settings and press the knob to make your selection. Select V for
the FUNCTION and 999 mV, 20 V or 5 V for the RANGE.

Connect the output leads of the PIE Model 235 to the inputs of the device being calibrated, making
sure to check polarity. Red lead to the plus (+) input and black lead to the minus (-) input.

Instantly output your SPAN and ZERO output settings by moving the EZ-CHECK switch between HI
and LO. You may also select any third output setting (such as mid-range) using the SET position on
the EZ-CHECK switch. The output is adjusted in 0.001 V, 0.01 mV or 0.1% increments by turning the
knob

e. Press and turn the knob for faster dialing with 0.100 V, 1.00 mV or 10.0% increments.

The red OVERLOAD indicator will light, a beeper will sound, and the display will flash if excessive
voltage or current is detected by the calibrator.

Sourcing DC Volts & Millivolts

Voltage Receiver Input

Controller

Transmitter

Computer

Recorder or Logger

DCS

2 1

+

-

HI

5.000V

www. .com

[e-mail]1.800.561.8187