Reference Standards (Open Collector); Device Under Test (D.u.t.); Rm-1S; Inputs - Radian RM-111 Operation Manual

Automated comparator

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5.1 Reference Standards (Open Collector)

Port A, B, C and D may be conﬁ gured as inputs for the reference standards that serve as the

reference for the test. The RM-111 knows how many reference standards due to the number

deﬁ ned in the TEST SETUPS menu. The reference standard may be autoranging or a device

with taps. The RM-111 will prompt the user to make the appropriate connections based on that

number. For example, if there are three reference standards listed in the TEST SETUPS menu the

RM-111 prompts the user to connect the reference standards to port A/B/C. If there is only one

reference standard deﬁ ned then the user would be prompted to connect the reference standard to

port A.

When using multiple reference standards the RM-111 determines the appropriate calculation

based the single-phase (1-Phase Avg.) or polyphase (Poly-PH Sum) selection made in the TEST

SETUPS menu. If single-phase is selected, the inputs (reference standards output) will be

averaged. If polyphase is selected the inputs will be summed. Selecting polyphase is necessary

for testing both polyphase standards and meters.

5.2 Device Under Test (DUT)

For testing solid state meters, induction meters or standards the input ports and PICKUP port on

the RM-111 are deﬁ ned as DUT inputs. These inputs can be the output of the standard, or in the

case of meter testing, any Radian accessory emitting some form of calibration pulse such as the

RM-1H, RM-1H/v, RR-1H, RR-DS, RM-DS, or RM-KYZ. The RR-1H, RR-DS, and RR-KYZ

are connected to the PICKUP PORT. Input pulses are acceptable from other open collector style

pulse output interfaces, such as *SC-10's and *SC-60's.

The RM-1S Remote Reset Switch, when connected to port A, replaces the ENTER and CANCEL

keys. This allows for the start, stop and reset cycling of any Radian standard connected to the

RM-111 output port. The cycling sequence continues until the user presses the CANCEL key

to stop the test cycle. This input option should only be used when the user wants to manually

control the testing process by counting disk revolutions.

Inputs

* See page 96

RM-111 Operations Manual

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