Define a category and measurement unit for an exposure type

task australia Updated Sep 10, 2026 1 min read hs-define-category-measurement-unit-exposure-type.md

Define a category and measurement unit for an exposure type. If needed, you can also associate a subcategory with an exposure type category.

Before you begin

Verify that the application scope is selected as Health and Safety Risk Management. For more information, see Application picker.

Role required: admin

Procedure

Navigate to All > System Definition > Tables.
Create an exposure category or update an existing one.
1. Select to open the Exposure type [sn_hs_rm_exposure_type] table.
2. In the Columns tab, select Exposure category from the list.
3. In the Choices tab, select New.
4. Fill in the fields.
  
  The value set in the Value field is used to associate a sub-category or a measurement unit with this category.
5. Select Submit.
Associate a subcategory with an exposure category.
1. In the Columns tab of the Exposure type [sn_hs_rm_exposure_type] table, select the Exposure sub-category from the list.
2. In the Choices tab, select New and fill in the fields.
3. In the Dependent value field, copy the exposure category's Value field defined in step 2d.
  
  This associates the subcategory with the required category.
4. Select Submit.
The subcategory is listed as a choice in the Sub-category field for the associated exposure category when creating an exposure type. For more information, see Define an exposure type.
Add a measurement unit for an exposure category.
1. Select to open the Measurement [sn_hs_rm_measurement] table.
2. In the Columns tab, select Measurement unit from the list.
3. In the Choices tab, select New and fill in the fields.
4. In the Dependent value field, copy the exposure category's Value field defined in step 2d.
  
  The value in the Dependent value field links the measurement unit with the required exposure category.
5. Select Submit.
The measurement unit is listed as a choice in the Measurement unit field during an exposure assessment for the exposure type. For more information, see Add a measurement and exposure source for an exposure assessment.

Parent Topic:Setting up Health and Safety Risk Management

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---
title: Define a category and measurement unit for an exposure type
description: Define a category and measurement unit for an exposure type. If needed, you can also associate a subcategory with an exposure type category.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/employee-service-management/health-and-safety-risk-management/hs-define-category-measurement-unit-exposure-type.html
release: australia
product: Health and Safety Risk Management
classification: health-and-safety-risk-management
topic_type: task
last_updated: "2026-09-10"
reading_time_minutes: 1
breadcrumb: [Configure, Health and Safety Risk Management, Health and Safety, Employee Service Management]
---

# Define a category and measurement unit for an exposure type

Define a category and measurement unit for an exposure type. If needed, you can also associate a subcategory with an exposure type category.

## Before you begin

Verify that the application scope is selected as Health and Safety Risk Management. For more information, see [Application picker](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/application-development/c_ApplicationPicker.md).

Role required: admin

## Procedure

1. Navigate to **All** &gt; **System Definition** &gt; **Tables**.

2. Create an exposure category or update an existing one.

1. Select to open the Exposure type \[sn\_hs\_rm\_exposure\_type\] table.

2. In the **Columns** tab, select `Exposure category` from the list.

3. In the **Choices** tab, select **New**.

4. Fill in the fields.

The value set in the **Value** field is used to associate a sub-category or a measurement unit with this category.

5. Select **Submit**.

3. Associate a subcategory with an exposure category.

1. In the **Columns** tab of the Exposure type \[sn\_hs\_rm\_exposure\_type\] table, select the `Exposure sub-category` from the list.

2. In the **Choices** tab, select **New** and fill in the fields.

3. In the **Dependent value** field, copy the exposure category's **Value** field defined in step 2d.

This associates the subcategory with the required category.

4. Select **Submit**.

The subcategory is listed as a choice in the **Sub-category** field for the associated exposure category when creating an exposure type. For more information, see [Define an exposure type](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/employee-service-management/health-and-safety-risk-management/hs-define-exposure-type.md).

4. Add a measurement unit for an exposure category.

1. Select to open the Measurement \[sn\_hs\_rm\_measurement\] table.

2. In the **Columns** tab, select `Measurement unit` from the list.

3. In the **Choices** tab, select **New** and fill in the fields.

4. In the **Dependent value** field, copy the exposure category's **Value** field defined in step 2d.

The value in the **Dependent value** field links the measurement unit with the required exposure category.

5. Select **Submit**.

The measurement unit is listed as a choice in the **Measurement unit** field during an exposure assessment for the exposure type. For more information, see [Add a measurement and exposure source for an exposure assessment](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/employee-service-management/health-and-safety-risk-management/hs-add-measurement-exposure-assessment.md).

**Parent Topic:**[Setting up Health and Safety Risk Management](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/employee-service-management/health-and-safety-risk-management/hs-setting-up-risk-mgmt.md)