Process Multimeter CA450

The Yokogawa CA450 Process Multimeter is a portable test instrument that combines a digital RMS multimeter and a loop calibrator, allowing process technicians to efficiently perform their tasks using a single tool. The Yokogawa CA450 provides 24-Volt loop power, reducing the need for carrying a separate power supply when performing transmitter testing. And with its built-in, selectable 250-Ohm Hart resistor, it also eliminates the need for a separate resistor. 

Technicians involved in industrial process maintenance must troubleshoot a variety of instrumentation in the field. This necessitates carrying a wide variety of tools and electrical equipment such as digital multimeters and calibrators/sorucing devices. Individual, single purpose devices may not have the varied functionality needed for equipment validation, in addition to being cumbersome and inefficient to carry. In these situations, a device that can  source, measure, and have PC compatibility would be the perfect instrument for the task. The CA450 Process Calibrator is defined by:

Varied Functionality

  • Source commonly used field instrumentation standards such as loop power, and miliamps DC
  • Measure like a DMM; capture and log current, voltage, resistance, and even DCS power 
  • Step/Sweep outputs for enhanced testing of field equipment
  • PC communication for traferring and saving data

Enhanced Safety

  • Prevent polarity error issues with terminal safeguards to prevent incorrect wiring
  • Conforms to 600V CAT. IV and 1000V CAT III



Loop Check Functions

  • Simultaneous 24 V loop power and mA measurement
  • HART mode setting with loop power (250 OHM resistance)


Generation Functions

  • SIMULATE (SINK) function simulates transmitters
  • 4-20 mA span/step/auto-step/sweep output


Measurement Functions

  • High accuracy signal measurement: DC mA 0.05%/30.000 mA
  • Handheld DMM function
  • Peak/Hold function for DCS power peak-to-peak measurement
  • Dedicated sensor modes for direct reading of many sensor signal types


Enhanced Safety - Helps Eliminate Electric Shocks

  • Current terminal shutter prevents incorrect connections
  • Sensor function handles AC load current measurement
  • Meets 600 V CAT. IV, 1000 V CAT. III safety standards


Linking with a PC

  • Transfer data to a PC via IR-U



Standard Accessories

  • 4 AA Batteries
  • Test Leads
  • Test Cable
  • 2 Fuses
  • Instruction Manual

Optional Accessories

  • 1-5V Adapter Set
  • DMM Communication Package
  • Alligator Test Leads
  • Hard Carrying Case
  • Various Current Clamp Probes


91040 Cleaning Unit

Can connect to –P1 or –P2, input and output port are Rc1/8” female thread

91041 Cleaning Unit

Can connect to –P1 or –P2, input and output port are 1/8” NPT female thread

91050 Hand Pump Kit (Low Pressure)

Hand pump (91051), connector set (91052), case (93052)

91051 Low Pressure Pump

Low Pressure Pump 91051 (Accessory for CA700)

91052 Hand Pump Connector (Low Pressure)

Connector set for the 91051 (quick adapter, pressure conversion adapter, flexible hose, sealing tape)

91055 Hand Pump Kit (Pneumatic)

Hand pump (91056), connector set (91057), case (93053)

91056 Pneumatic Pressure Pump

Pneumatic Pressure Pump 91056 (Accessory for CA700)

91057 Hand Pump Connector (Pneumatic)

Connector set for the 91056 (quick adapter, sealing cap, flexible hose, sealing tape, and hex wrench)

91060 Hand Pump Kit (Hydraulic)

Hand pump (91061), connector set (91062), case (93053)

91061 Hydraulic Pressure Pump

Hydraulic Pressure Pump 91061 (Accessory for CA700)

91062 Hand Pump Connector (Hydraulic)

Connector set for the 91061 (high-pressure hose, quick adapter, conversion adapter, sealing tape, and hex wrench)

91080 Connector

R 1/4" male thread to 1/8” NPT female thread conversion connector (for -P1)

91081 Connector

R 1/4” male thread to 1/4” NPT female thread conversion connector (for -P1)

91082 Connector

1/4” NPT male thread to 1/8” NPT female thread conversion connector (for –P2)

93050 Carrying Case

Carry your Scopecorder with this carrying case.

93052 Hand Pump Case (Low Pressure)

Case for the 91051 (91051, 91052, and instruction manual)

93053 Hand Pump Case (Pneumatic/Hydraulic)

Case for the 91056/91061 (91056, 91057, 91061, 91062, and instruction manual)

98026 Grabber Clip

A set of separate red and black clips (for 2 m long wires).

98064 Lead Cables

Alligator clip, CAT I, for controlsignal only (under 70 V)One set of 1 red and 1 black cablesLength: Approx. 1.7m

B9108XA Accessory storage case

Lead cables, RJ sensor, etc. can be stored.

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