Altek Model 934 Milliamp Voltage Loop Calibrator Manual

PN 1886535 Rev A April 2002
©2002 Altek Industries, Inc. Specifications subject to change without notice.
All tights reserved. Printed in U.S.A.
Multifunction Loop Calibrator
Model 934 

ORDERING INFORMATION               Part No.
MODEL 934 MULTIFUNCTION
LOOP CALIBRATOR                                             934
A carrying case is included with each Model 934
Contents
GENERAL INFORMATION......................................................... 2
YOUR NEW CALIBRATOR...................................................... 2
MILLIAMP CALIBRATION...................................................... 3
VOLTAGE CALIBRATION ........................................................ 3
QUIK-CHEK...

1
FEATURES
• DUAL LIQUID CRYSTAL DISPLAY
Simultaneous Source and Read
• LABORATORY ACCURATE
±(0.012% of Reading + 0.008% of Full Scale Reading)
Accurate to ±0.004 mA from 4 to 20 mA
• USER SETTABLE “QUIK-CHEK®s”
Set any Span & Zero
• FULL FIVE DIGIT DISPLAYS
Source up to 24.000 mA, 20.000 V or 999.90 mV
Read up to 52.000 mA, 99.990 V or 999.90 mV
• SCALEABLE DISPLAY
Set in engineering units
• SPEED SENSITIVE DIGIPOT
Fast setting to any desired value
• “AUTO-CHEK”
TM OUTPUTS
Automatically outputs in 2, 3,...

2
GENERAL INFORMATION
Simultaneously source and read any combination of
process milliamp and voltage signals. Alteks Model 934
combines all the functionality of a milliamp and a
voltage calibrator! This dual function calibrator continuously
displays the output and input signals. The top half of the
display indicates the output setting while the lower half of
the display shows the signal being measured.
Calibrate state of the art equipment such as smart
transmitters and indicators to 4
1/2 or more digits...

3
GENERAL INFORMATION
MILLIAMP CALIBRATION
Use at any point in your 4 to 20 milliamp loop. Source
milliamps directly into your receivers with loop loads up to 1200
Ohms. Simulate 2-Wire Transmitters for checkout of field
wiring and total loop testing. Power and measure
2-Wire or 4-Wire transmitters on the bench before installation.
Read Transmitter & Controller outputs up to 52.00 mA.
Display directly in milliamps, percent of 4 to 20 mA, percent
of DP Flow or engineering units to match the scale of
your...

4
ROCHESTER NY 14623ALTEK 934SOURCE19.934mA
mA/V LOOP CALIBRATOROFF ONHI
SET
LOMAX
READ
MIN
9VDC
AUTO-CHEK HI
MINREAD0.000V
SOURCE
STOREQUIK-CHEK ®SETUP
READ
RESETSETUP
500
        MAXSOURCESOURCEREAD
OPERATING INSTRUCTIONS
GENERAL
TURN-ON
Each time the Model 934 is turned on,
the LCD will display all segments for about
1 second. It then displays the most recently
selected Source & Read Settings.
1) Move the power switch to 
ON.
All segments on the LCD are turned
on during self test.
2) The upper half of...

5
OPERATING INSTRUCTIONS
GENERAL
FIELD & BENCH USE
The Model 934 comes with a carrying
case and a built-in tilt stand/hanger.
The 934 is held securely in the case
by VELCRO
® for use with the carrying
case open. The carrying case also has a
snap-on belt loop which can also be
looped around a pipe or rail.
    The tilt stand is easily raised by pulling
the stand until it locks into place. The
stand can also be reversed for use as a
hanger to suspend the Model 934.
RESTORE DEFAULT SETTINGS
The Model 934...

6
OPERATING INSTRUCTIONS
ENABLING ADDITIONAL RANGES & FUNCTIONS
The Model 934 has two additional ranges for displaying % DP
Flow and Engineering Units. Additional  functions are AUTO-
CHEK (automatic stepping of outputs) and AUTO-OFF.
These ranges & functions are enabled by configuring DIP
Switches (see next page). After the functions are enabled they
are available as selections during setup (see OPERATING
INSTRUCTIONS, SOURCE or READ).
AUTO-OFF
The Model 934 can be set up to turn itself off after 30...

BOTTOM BOARD
Calibrator Enabled
(Jumper Shorted)
on
off
CAL
7
OPERATING INSTRUCTIONS
ENABLING ADDITIONAL RANGES & FUNCTIONS
The DIP switches are located in
the battery compartment. Turn the
Model 934 off and loosen the three
slotted screws and remove the battery
cover.
38
CALIBRATION PROCEDURE
SUGGESTED EQUIPMENT
1) Digital voltmeter with accuracy of ±0.003% of reading at
2V and ±0.005% of reading at 100V
Important: The required accuracy is usually found
only on meters with 71/2  or more digits
2) 100...

8
√
OPERATING INSTRUCTIONS
 RANGES
The selected range is displayed on the LCD by the
annunciators listed below.
MILLIAMPS - mA
Choose mA to display directly in milliamps. Display in SOURCE
and READ functions from 0.000 to 24.000 mA. In READ you
can also measure up to 52.00 mA.
PERCENT OF 4 - 20 MILLIAMPS - mA %
Choose mA % to display in percent of span for 4 - 20 mA loops.
Use with chart recorders or current trips that display in %.
0.00% 4.000 mA
25.00%8.000 mA
50.00%12.000 mA
75.00%16.000 mA
100.00%...