API APD 4059 CR Manual Download Page 2

Precautions

WARNING! All wiring must be performed by a qualified electrician 
or instrumentation engineer. See diagram for terminal designa-
tions and wiring examples. Consult factory for assistance. 
WARNING! Avoid shock hazards! Turn signal input, output, and 
power off before connecting or disconnecting wiring, or remov-
ing or installing module.

Précautions

ATTENTION! Tout le câblage doit être effectué par un élec-
tricien ou ingénieur en instrumentation qualifié. Voir le dia-
gramme pour désignations des bornes et des exemples de 
câblage. Consulter l'usine pour assistance.
ATTENTION! Éviter les risques de choc! Fermez le signal 
d'entrée, le signal de sortie et l'alimentation électrique avant 
de connecter ou de déconnecter le câblage, ou de retirer ou 
d'installer le module. 

Internal Calibration Resistor

The APD 4059 CR has provisions for and internal shunt/calibra-
tion resistor. It can be ordered with the module or installed by 
the user. The resistor value should match what is specified by 
the transducer manufacturer. 
The calibration resistor can be installed or changed in the field 
if required by following the procedure below. 
1.  Remove all power from the APD 4059 CR, unplug all con-

nectors, and remove unit from DIN rail.

2.  Using a small flat-blade screwdriver remove the front panel 

as shown below.

3.  Note the locations of the seven tabs attaching the side cover.
4.  Using a small flat-blade screwdriver gently pry the tab ends 

away from the housing. Start with the large tab at the rear 
of the unit, and work towards the front while gently pulling 
up on the side cover. 

5.  When all tabs are unlatched, remove the side cover. 
6.  To remove the calibration resistor (if one was installed), pull 

it out of its holder. The calibration resistor should have the 
leads cut and bent to fit the calibration resistor holder.

7. Align the side cover and snap into place making sure all 

seven tabs are engaged. Snap front cover back into place. 
Reinstall unit. 

Internal Calibration Resistor

Range Selection

It is generally easier to select ranges before installing the mod-
ule on the DIN rail. The tables list available settings for excita-
tion voltages, ranges and offsets. Any custom range settings 
will be listed on the module's serial number label
Use the rotary switches and a slide switches on the side of the 
module to select input and output ranges for your application. 
Switch A: 

Excitation voltage

Switch B: 

Input range

Switch C: 

Input offset

Switch D: 

Output range

Switch E : 

Set to "V" for voltage output or 

 

Set to "I" for current output

Determine how much output in millivolts the load cell will pro-
duce at full load. Multiply the manufacturer's mV/V sensitivity 
specification by the applied excitation voltage.
For example, a load cell rated for 3 mV/V sensitivity using 10 
VDC excitation will produce an output of 0 to 30 mV for load 
variations from 0 to 100%.

3 mV/V sensitivity  X  10 VDC excitation  =  30 mV range

Switch A Excitation Voltage

Refer to the sensor manufacturer's 
recommendations to determine what 
excitation voltage to use.
Set Excitation rotary switch A to 
desired excitation voltage.
After installation the Excitation fine 
adjust potentiometer may be used to 
precisely trim this voltage, if desired.

I/O Range Selection 
Switches B, D, E

1. From the table at the bottom of the page, find the rotary 

switch combination that matches your I/O ranges and set 
rotary switches B and D.

2. For taring, deadweight, zero offset, or a bipolar sensor 

refer to the "Offset Switch C" section below. Otherwise set 
switch C to zero.

3.  Set switch E to "V" for voltage output or "I" for current output.
4.  For ranges that fall between the listed ranges use the next 

highest setting and trim the output signal with the zero and 
span potentiometers as described in the Calibration section. 

Using Offset Switch C

Offset switch C allows canceling or taring of non-zero dead-
weights or other sensor offsets such as:

 

O

Compensate for tare weights or scale deadweight to get 
zero output when a load is on the platform. 

 

O

Compensate for low-output sensors (e.g., less than 1 mV/V) 
that may have large zero offsets. Switch C can realign 
the zero control so it has enough range to produce a zero 
output. 

 

O

Raising the offset to allow calibration of bipolar sensors 
such as ±10 mV.

 

O

Lowering the offset to compensate for elevated input ranges 
such as 10-20 mV.

1. Switch C does not interact with 

any other switch and is the only 
switch needed to correct zero 
offsets. Its only purpose is to 
adjust or cancel effects of the 
low end of the input range not 
corresponding nominally to 0 mV. 
Setting this switch to “0” results 
in no offset.

2.  To RAISE the output zero, rotate 

switch C from “1” thru “7”, until 
the Zero control can be set for 
your application.

3.  To LOWER the output zero, rotate 

switch C from “9” thru “F”, until 
the Zero control can be set for 
your application. 

4. If switch positions are changed, 

repeat the calibration procedure on the last page.

Precautions, Calibration Resistor, Range Setup 

APD 4059 CR

Output

0-1 V

0-2 V

0-4 V

1-5 V

0-5 V

0-8 V

2-10 V 0-10 V

±5 V

±10 V 0-2 mA 0-4 mA 0-8 mA 2-10 mA 0-10 mA 0-16 mA 4-20 mA 0-20 mA

Switches

BCDE

BCDE

BCDE

BCDE

BCDE

BCDE

BCDE

BCDE

BCDE

BCDE

BCDE

BCDE

BCDE

BCDE

BCDE

BCDE

BCDE

BCDE

Input

 

0-5 mV

200V

208V

201V

206V

209V

202V

207V

203V

204V

205V

200I

208I

201I

206I

209I

202I

207I

203I

  0-10 mV

A00V

A08V

A01V

A06V

A09V

A02V

A07V

A03V

A04V

A05V

A00I

A08I

A01I

A06I

A09I

A02I

A07I

A03I

  0-20 mV

300V

308V

301V

306V

309V

302V

307V

303V

304V

305V

300I

308I

301I

306I

309I

302I

307I

303I

  0-25 mV

600V

608V

601V

606V

609V

602V

607V

603V

604V

605V

600I

608I

601I

606I

609I

602I

607I

603I

  0-30 mV

E00V

E08V

E01V

E06V

E09V

E02V

E07V

E03V

E04V

E05V

E00I

E08I

E01I

E06I

E09I

E02I

E07I

E03I

  0-40 mV

B00V

B08V

B01V

B06V

B09V

B02V

B07V

B03V

B04V

B05V

B00I

B08I

B01I

B06I

B09I

B02I

B07I

B03I

  0-50 mV

000V

008V

001V

006V

009V

002V

007V

003V

004V

005V

000I

008I

001I

006I

009I

002I

007I

003I

  0-100 mV

800V

808V

801V

806V

809V

802V

807V

803V

804V

805V

800I

808I

801I

806I

809I

802I

807I

803I

  0-120 mV

F00V

F08V

F01V

F06V

F09V

F02V

F07V

F03V

F04V

F05V

F00I

F08I

F01I

F06I

F09I

F02I

F07I

F03I

  0-200 mV

100V

108V

101V

106V

109V

102V

107V

103V

104V

105V

100I

108I

101I

106I

109I

102I

107I

103I

  0-250 mV

400V

408V

401V

406V

409V

402V

407V

403V

404V

405V

400I

408I

401I

406I

409I

402I

407I

403I

  0-300 mV

C00V

C08V

C01V

C06V

C09V

C02V

C07V

C03V

C04V

C05V

C00I

C08I

C01I

C06I

C09I

C02I

C07I

C03I

  0-400 mV

900V

908V

901V

906V

909V

902V

907V

903V

904V

905V

900I

908I

901I

906I

909I

902I

907I

903I

Remove front cover with  

flat-blade screwdriver

1

2

3

4

5

6

7

Calibration resistor holder

Calibration resistor

Excitation Switch A

 

10 V

A

 

9 V

9

 

8 V

8

 

7 V

7

 

6 V

6

 

5 V

5

 

4 V

4

 

3 V

3

 

2 V

2

 

1 V

1

 

0 V

0

Offset 

% of Span Switch C

 105%

7

 90%

6

 75%

5

 60%

4

 45%

3

 30%

2

 15%

1

 0%

0

  –15%

9

  –30%

A

  –45%

B

  –60%

C

  –75%

D

  –90%

E

  –105%

F

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Phone: 

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Fax: 800-949-7502

A

A

BSOLUTE

BSOLUTE

 P

 P

ROCESS

ROCESS

 I

 I

NSTRUMENTS

NSTRUMENTS

API maintains a constant effort to upgrade and improve its products. 

Specifications are subject to change without notice. See api-usa.com for 

latest product information. Consult factory for your specific requirements.

WARNING:

 This product can expose you to chemicals includ-

ing nickel, which are known to the State of California to cause 

cancer or birth defects or other reproductive harm. For more 

information go to www.P65Warnings.ca.gov

Summary of Contents for APD 4059 CR

Page 1: ...The test switch is used to shunt the calibration resistor across one arm of bridge to simulate strain Removable Plugs Strain Gauge Input Ranges 100 Ω to 10 000 Ω bridges at 10 VDC Up to four 350 Ω bridges at 10 VDC Minimum 0 to 5 mV range 0 5 mV V sensitivity Maximum 0 to 400 mV range 40 mV V sensitivity Millivolt output range is determined by the sensor sensitivity mV V and the excitation voltage...

Page 2: ...s that fall between the listed ranges use the next highest setting and trim the output signal with the zero and span potentiometers as described in the Calibration section Using Offset Switch C Offset switch C allows canceling or taring of non zero dead weights or other sensor offsets such as O Compensate for tare weights or scale deadweight to get zero output when a load is on the platform O Comp...

Page 3: ... CAUTION To maintain full isolation avoid wiring DC power sup plies in common with output and unit power Wiring and Installation APD 4059 CR If your load cell has an internal calibration resistor remove the calibration resistor inside the APD4059 CR Type of Device for Output Term Term mA current input device that powers the current loop Switch E set to I 2 3 mA current input device that is pas siv...

Page 4: ...icator Adjusting the zero pot this way eliminates calibration errors in the display instrumentation 5 Set the APD 4059 CR Test toggle switch to the Test position The calibration resistor is switched into the circuit to unbal ance the bridge 6 Adjust the span pot to the for the output specified by the transducer manufacturer This is often 80 of maximum output 7 Return the Test switch to the opposit...

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